9Alvarez L, Perez-Higueras A, Granizo JJ, et al. Predictors of outcomes of percutaneous vertebroplasty for osteoporotic vertebral fractures. Spine (Phila Pa 1976), 2005, 30(1): 87-92.
10De Negri P, Tirri T, Paternoster G, et al. Treatment of painful osteoprotic or traumatic vertebral compression fractures by percutaneous vertebral augmentation procedures: a nonrandomized comprison between vertebroplasty and kyphoplasty. Clin J Pain, 2007, 23(5): 425-430.